Material handling apparatus

ABSTRACT

Material handling apparatus is disclosed for receiving, transporting and dumping a material. The material handling apparatus has a dump type box having a bottom portion, opposed side portions and a back portion defining a load carrying cavity. The dump type box also has a front fork engaging member on one portion of a side portion and said bottom portion, a rear fork engaging member on the one portion and spaced from the front fork engaging member, and a fork engaging stirrup member on the one portion, disposed between the front fork engaging member and the rear fork engaging member and pivotable on the one portion. A lifting fork device is reciprocable in a vertical plane with respect to the supporting surface and has a tine. The tine is insertable through the fork engaging stirrup member while the dump type box is in the rest position and into registry with the front fork engaging member and the rear fork engaging member so that the tine engages the front fork engaging member and the rear fork engaging member when the tines moves the dump type box away from the rest position into a box transporting position to permit filling of the load carrying cavity with a material. The tine then is operable to return the filled dump type box to the rest position to permit the tine to clear the front fork engaging member, while the filled dump type box is in the rest position. The tine then is operable to move the filled dump type box away from the rest position so that the filled dump type box rotates about the fork engaging stirrup member into a dumping position thereby emptying the filled load carrying cavity.

United States Patent Keneson et al.

[is] 3,656,643 [451 Apr. 18, i972 [s4] MATERIAL HANDLING APPARATUS-Primary Examiner-Gerald M. Forlenza Assistant Examiner-Lawrence .I.Oresky Attorney-Robert J. Leek, Jr.

[ 5 7] ABSTRACT Material handling apparatus is disclosed for receiving,transporting and dumping a material.

The material handling apparatus has a dump type box having a bottomportion, opposed side portions and a back portion defining a loadcarrying cavity. The dump type box also has a front fork engaging memberon one portion of a side portion and said bottom portion, a rear forkengaging member on the one portion and spaced from the front forkengaging member, and a fork engaging stirrup member on the one portion,disposed between the front fork engaging member and the rear forkengaging member and pivotable on the one portion. A lifting fork deviceis reciprocable in a vertical plane with v respect to the supportingsurface and has a tine.

The tine is insertable through the fork engaging stirrup member whilethe dump type boxis in the rest position and into registry with thefront fork engaging member and the rear fork engaging member so that thetine engages the front fork engaging member and the rear fork engagingmember when the tines moves the dump type box away from the restposition into a box transporting position to permit filling of the loadcarrying cavity with a material. The tine then is operable to return thefilled dump type box to the rest position to permit the tine to clearthe front fork engaging member, while the filled dump type box is in therest position. The tine then is operable to move the filled dump typebox away from the rest position so that the filled dump type box rotatesabout the fork engagingstirrup member into a dumping position therebyemptying the filled load carrying cavity.

25 Claims, 10 Drawing Figures PATENTEDAPR 18 I972 3. 656,643

' SHEET 1 [1F 3 INVENTORS GEORGE KE/VESO/V 8 MARIO/V D. LEW/S Attorney IMATERIAL HANDLING APPARATUS Conventional devices are ofthe typedisclosed in the following patents:

The Dewald patent discloses a dumping bin for use with a fork lifttractor. The dumping bin is self contained but requires the operator topull a latch thereby causingdumping of the bin.

The King et al. patent shows a dumping box and an additional attachmenton the fork lift truck which is operable to dump the box.

In the Martin Patent, the dump box is pivotable and has a fork liftattachment for causing the dumping of the box.

The Gatz et a1. patent uses a complicated mechanism usable with the forklift to tilt the fork at an angle for use in dumping.

The Draxler patent uses an overhead boom type arrangement for use in afork lift truck to cause dumping of the box.

In the McDaniels patent, the box is dumped by a complicated chain typeoverhead boom.

OBJECTS OF THE INVENTION It is the general object of this invention toavoid and overcome the foregoing and other difficulties of andobjections to prior art practices by the provision of improved materialhandling apparatus for receiving, transporting and dumping material. Theimproved apparatus:

1. eliminates the use of the conventional latch to dump the material;

2. eliminates the use of the conventional attachment on the associatedfork lift which attachment is operable to dump the box;

3. does not require a complicated mechanism on the fork lift to causedumping;

4. eliminates the use of overhead booms to cause dumping of the box;

5. is simple and rugged in structure;

6. has few moving parts;

7. requires little or no maintenance;

8. has a long operational life; and

9. is readily adapted to any required volume of load carrying cavity.

BRIEF SUMMARY OF THE INVENTION The aforesaid objects of this invention,and other objects which will become apparent as the descriptionproceeds, are achieved by providing an improved bulk material handlingaparatus.

p The material handling apparatus has a dump type box having a bottomportion, opposed side portions and a back portion defining a loadcarrying cavity. The dump type box also has a front fork engaging memberon one portion of a side portion and said bottom portion, a rear forkengaging member on the one portion and spaced from the front forkengaging member, and a fork engaging stirrup member on the one portion,disposed between the front fork engaging member and the rear forkengaging member and pivotable on the one por tion. A lifting fork deviceis reciprocable in a vertical plane with respect to the supportingsurface and has a tine.

The tine is insertable through the fork engaging stirrup member whilethe dump type box is in the rest position and into registry with thefront fork engaging member and the rear fork engaging member so that thetine engages the front fork engaging member and the rear fork engagingmember when the tine moves the dump type box away from the rest positioninto a box transporting position to permit filling of the load carryingcavity with a material. The tine then is operable to return the filleddump type box to the rest position to permit the tine to clear the frontfork engaging member. while the filled dump type box is in the restposition. The tine then is operable to move the filled dump type boxaway from the rest position so that the filled dump type box rotatesabout the fork engaging stirrup member into a dumping position therebyemptying the filled load carrying cavity.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS For a betterunderstanding of this invention, reference should be had to theaccompanying drawings, wherein like numerals of reference indicatesimilar parts through the several views and wherein:

FIG. 1A is a perspective view taken from the back portion of a dump typebox of the present invention and showing the flag holder, the front tineengaging member. the tine engaging stirrup member, the rear tineengaging member. the first stop means on the side portions of the boxfor limiting the pivotable dumping movement of the box and the secondstop means on the back portion of the box for limiting the relativemovement of the box with respect to the lifting fork truck;

FIG. 1B is a perspebtive view of a conventional fork lift truck takenfrom the back portion of such truck and showing the tines, the mast onwhich the tines are vertically reciprocable, and the oscillatingmechanism, such as a pair of fluid cylinders or the like, foroscillating the mast and the tines about a lower pivot point (not shown)for the mast on the truck frame;

FIG. 2 is a view similar to a side elevational view of the dump type boxtaken along the lines 2--2 of FIG. 1A in the direction of the arrows andshowing an alternative embodiment of the second stop means mounted onthe side portions of the dump type box;

FIG. 3 is a back view taken along the lines 3-3 of FIG. 1A in thedirection of the arrows of the dump type box shown in FIG. 1A;

FIG. 4 is a side elevational schematic view showing the dump type boxand the tines with the box in its normal rest position on a supportingsurface, such as the floor or the like. and showing the tines inengagement with the opposed front l fork engaging member and the opposedrear fork engaging members preparatory for the lifting operation;

FIG. 5 is a view similar to FIG. 4 and showing the loaded dump type boxand tines in the angled transporting position preparatory for movementby the fork lift truck to a dumping area;

FIG. 6 is a view similar to FIGS. 4 and 5 showing the dump box in thedumping position just prior to engagement of the first stop means by theouter ends of the tines;

FIG. 7 is a view similar to FIG. 3 of an alternative embodiment of thedumping type box showing the stirrup member mounted on the bottomportion of the box, having the rear fork engaging member removed forclarity and showing a single broad tine in engagement with the stirrupmember;

FIG. 8 is a view similar to FIG. 7 and showing another alternativeembodiment having a vertically mounted stirrup member on one sideportion of the dump type box and having the rear fork engaging memberremoved for clarity; and

FIG. 9 is a view similar to FIG. 2 of a further alternative embodimentof the box and showing two types of a first guard means (two guard meansof one type being shown in dotted lines for use with the first stopmeans and the other of which dotted line guard means is employed withoutthe first stop means) and also showing an arcuate type first guard meansin solid lines, and showing further a second guard means, one of whichis shown in dotted lines and is of straight line type and the other ofwhich is shown in solid lines and being arcuate in shape.

Although the principles of this invention are broadly applicable to dumptype boxes in general, this invention is particularly adapted for use inconjunction with a dump type box for use with various forms of a forklift truck and hence it has been so illustrated and will be sodescribed.

DETAILED DESCRIPTION With specific reference to the form of thisinvention illustrated in the drawings, and referring particularly toFIGS. lA,2,3,4-6, a dump type box of the present invention is generallyindicated by the reference numeral 10.

DUMP BOX This dump type box 10 has a bottom portion 10a (FIGS. 1A,2-6),opposed side portions 10b (FIGS. 1A,2-6) and a back portion 100 (FIGS.1A,26) which together define a load carrying cavity 12 (FIGS. 1A). Thebottom portion 100 of the box 10 is normally adapted to rest in a normalrest position on a supporting surface, such-as for example, the floor 14or the like (FIGS. 4-6).

The dump type box 10 also has (on the side portions 10b) opposed frontfork engaging members 16 (FIGS. 1A,2,4-6), opposed rear fork engagingmembers 18 (FIGS. 1A,26) and opposed fork engaging stirrup members 20(FIGS. 1A,26). Each stirrup member 20 is disposed between a front member16 and a rear member 18 and is pivotable at 22 (FIGS. lA,2-6) on anoutboard bearing bracket 24 (FIGS. 1A,26). As shown in FIGS. 1, 2-6, thepivot 22 consists of a shaft which is welded to the top portions of eachof the stirrup members 20 and is journaled in the side portion 10b andthe bottom portions of the outboard bearing bracket 24. As shown inFIGS. lA,2-6, the dump type box 10 is provided with flag holders 25 inwhich flags (not shown) may be mounted. Such flag holders 25 can bemounted on the forward and upper portions of the side portions 10b(FIGS. 1A,2-6) or on the back portion 10c (not shown).

TRUCK 26 This truck 26 (FIG. 18) may be of the type identified by thetrade name Hyster" or Challenger type No. 225, manufactured by theHyster Company, Danville, Illinois. The truck 26 has a pair of tines 28(FIGS. 1B,4-6) mounted on a tine bracket 30 (FIG. 1B), which tinebracket 30 is reciprocable on a mast 32 of the truck 26. The means 31(FIG. 1B) utilized to reciprocate the tines 28 vertically has racks 34(FIG. IE) on the mast 32 (FIG. 1B) and engageable with pinions (notshown) on the tine bracket 30 and a drive means, such as a motor (notshown) or the like connected to the pinions (not shown) for moving thetines 28 up and down on the mast 32. The oscillating means 40 (FIG. 1B)for moving the mast 32 and the tines 28 forward arcuately or backwardarcuately about a fixed pivot (not shown) of the mast 32 on a frame 44of the truck 26 is, for example, a pair of fluid cylinders 46 (FIG. 1B)or the like.

OPERATION While the dump type box is in the normal rest position shownin FIG. 4 (namely having its bottom portion 10a resting on such floor14), the tines 28 are insertable through a stirrup cavity 20a (FIGS. 1A,2-3) of the stirrup members 20 and into registry with the front members16 and the rear members 18. Energization of the reciprocating means 31(FIG. IE) on the truck 26 raises the tines 28 into engagement with thefront members 16 and the rear members 18, it being noted from aconsideration of FIG. 2 that the top portion of the stirrup cavity 20aclears the tines 28 by a distance C (FIG. 2). Thereafter thereciprocating mechanism 31 on the truck 26 raises for example, the box10 to a position a considerable distance above the ground or floor 14and the oscillating means or mechanism 40 (FIG. IB) tilts the mast 32backwardly through an angle A, (FIG. 5) into the box transportingposition to permit, for example. filling ofthe load carrying cavity 12with a bulk material 48 (FIG. 6), such as coal, dirt, snow or the like,or to transport a now filled box 10 to a dumping location or area (notshown in FIG. 5).

When, for example, the truck 26 has transported the box 10 filled withthe bulk material 48 to a dumping location L (FIG. 6), the oscillatingmechanism 40 (FIG. 18) on the truck 26 moves the tines 28 and the nowfilled box 10 to a position (not shown) substantially parallel to afloor or ground 14 indicated by the dotted line 14 in FIG. 6. Then thereciprocating mechanism 31 on the truck 26 lowers the now horizontallydisposed loaded box 10 to the rest position shown in FIG. 4. The truck26 then further lowers the tines 28 from engagement with the frontmembers 16 and the rear members 18 so that the forward portions of thetines 28 may be withdrawn to the position shown in FIG. 6 and so thatthe forward portions of the tines 28 backwardly clear the front members16.

Thereafter the reciprocating mechanism 31 on the truck 26 raises thetines 28 to the position shown in FIG. 6 so that the box 10 pivots in acounterclockwise direction (as shown by the arrow in FIG. 6) on thepivot 22 to permit the bulk material 48 to pour out of the open end ofthe box 10 onto the ground 14. This rotating dumping movement of the box10 (shown in FIG. 6) is limited either by the forward portions of thebottom portion 10a striking the floor or ground 14 (which ground 14 isindicated by the dotted horizontal line in FIG. 6) or by engagement ofthe first stop means 50 shown in FIGS. 1A,26 engaging the outboardportions of the tines 28. The first stop means 50 is suitably a pair ofrods or the like mounted on the upper forward portions of the sideportions 10b ofthe box 10.

As is shown in FIGS. lA,3-6, the rear portions or back portion of thebox 10 may be provided with a horizontally disposed second stop means52, suitably a pair of rods or the like, welded to the back portion 10cofthe box 10 and projecting generally horizontally or at somepreselected angled position (not shown) beyond the side portions 10b ofthe box 10. The stop rods 52 are utilized to limit the relative movementbetween the back portion 10c of the box 10 and tines 28 of the truck 26as shown in FIGS. 4,5.

It will be noted from a consideration of FIGS. 1A,2,4-6, that the pivotpoint 22 of the box 10 is desirably disposed rearwardly of the center ofgravity G-G a distance D (FIGS. 2,4-6) to accelerate and facilitate thedumping operation illustrated in such figures.

ALTERNATIVE EMBODIMENTS It will be understood by those skilled in theart that alternatively, as shown in FIG. 2, the second stop rods 52 or52 (FIG. 9) project from either the bottom portion 10a or the sideportions 10b of the box 10 in the case where the back portion 100 isdisposed within the side portions 10b of the box 10 (FIGS. 2,9).

FIG. 7 shows a stirrup member 20 having its pivot rod 22 journaled inbrackets 24", which brackets 24 depend from the bottom portion 10a ofthe box 10. In the embodiment of FIG. 7, the box 10 may be provided withfour legs 54. It will be noted in FIG. 7 that the truck (not shown) isprovided with a single relatively wide tine 28 Rotary dumping movementmay be limited by the forward portions of the bottom portion 10a of thebox 10 striking the ground 14.

FIG. 8 shows a generally vertically mounted stirrup member 20 having itstine receiving cavity 20:: disposed in a generally vertical planesubstantially parallel to the side portion 10b of the box 10". In thisembodiment the truck (not shown) has a single vertical tine 28 which isreceived in the tine receiving cavity 20a.

As shown in FIGS. 2 and 9, the forward portions of the bottom portion10a may be tapered downwardly at 56 to facilitate scoop loading of thedump type box 10 (FIG. 2) or 10 (FIG. 9).

In order to prevent entanglement of the tine 28 (FIG. 7), 28* (FIG. 8)or the tines 28 shown in FIGS. 1A,26 between either the front members 16and the brackets 24 and the back members 18, a first guard means 58(shown in the left-hand 5. said'tine then being operable to return saidfilled dump portions of FIG. 9) and a second guard means 60 (shown intype box to said rest position to permit said tine to clear theright-handportions of FIG. 9) may be employed. In FIG. 9, an arcuatefirst guard means 58a is shown in solid lines exsaid front fork engagingmember, while said dump type box is in said rest position,

tending between the top of the front member 16 and the top of 5 6. saidtine then being operable to move said dump type the bracket 24.Alternatively, a straight line type plate or first box away from saidrest position so that said filled guard means 58b may extend from thetop of the first member dump type box rotates about said fork engagingstirrup 16 to the top of the first stop rod 50 and from the top of themember into a p g Position and first stop rod 50 to the top of thebracket 24. In the case vwhere 10 7- Said front fork engaging member andsaid rear fork enthe first stop rod 50 is not employed, a straight platetype first guard means 580 may extend directly (as shown in the lowergagingmember defining a tine engaging curve registerably with said tinepreparatory for the lifting operation.

dotted lines of FIG. 9) from the top of the first member 16 to the topof the bracket 24.

Referring now to the right-hand portions of FIG. 9, an arcu- 1 atesecond guard means 60a is shown by the solid lines and a straight platetype second guard means 60b is shown in the 2. In combination: a. asupporting surface; and b. a material handling apparatus having:

I. a dump type box having a bottom portion, opposed side LII dottedlines. Both second guard plates 60a and 60b extend substantially fromthe top of the bracket 24 to the top of the portions and a back portiondefining a load carrying cavity adapted to receive a bulk material,

back member 20 2. said dump type box also having:

a. a front fork engaging member on one portion of a SUMMARY OF THEACHIEVEMENTS OF THE OBJECTS side portion and said bottom portion,

OF THE INVENTION b. a rear fork engaging member on said one portion andspaced from said front fork engaging member, and It will be recognizedby those skrlled in the art that the ob C. a fork engaging Stirrupmember on Said one portion,

jects of this invention have been achieved by providing an improved dumptype box 10 (FIGS. lA,2-6), 10 (FIG. 7), 10' (FIG. 8) and 10 (FIG. 9),for use with a lift fork truck 26 of the type shown in FIG. -1B. Thisimproved apparatus eliminates the use of the conventional latch (notshown) used to dump the bulk material 48, eliminates the use of theconventional attachments on the fork lift truck 26, which attachments(not shown) are operable to dump the box 10 (FIGS. lA,2-6), 10 (FIG. 7),10 (FIG. 8) and 10 (FIG. 9) does not require a complicated mechanism(not shown) on the fork lift truck 26 to cause dumping of the bulkmaterial 48 therefrom; eliminates the use of conventional overhead booms(not shown) to cause the dumping of the bulk material 48 from the box 10(FIGS. lA,2-6), 10 (FIG. 7), 10 (FIG. 8) and 10 (FIG. 9); is simple andrugged in structure; has few moving parts; requires little or nomaintenance; has a long operational life; and is readily adapted to anyrequired volume or capacity of the load carrying cavity 12 (FIG. 1A).

While in accordance with the patent statutes, preferred and disposedbetween said front fork engaging member and said rear fork engagingmember and pivotable on said one portion,

3. a lifting fork device reciprocable in a vertical plane with respectto said supporting surface and having a tine,

4. said tine being insertable through said fork engaging stirrup memberwhile said dump type box is in a rest positionand into registry withsaid front fork engaging member and said rear fork engaging member sothat said tine engages said front fork engaging member and said rearfork engaging member when said tine moves said dump type box away fromsaid rest position into a box transporting position,

5. said tine then being operable to return said filled dump type. box tosaid rest position to permit said tine to clear said front fork engagingmember, while said dump type box is in said rest position,

6. said tine then being operable to move said dump type alternativeembodiments of this invention have been illusb ay fr m aid e t o itio oth t id filled trated and described in detail, it i8 to be particularlyundump type box rotates about said fork engaging stirrup derstood thatthe invention is not limited thereto or thereby. b im a d i i i d Weclaim: 7. said rear fork engaging member and said fork engaging 1. Incombination: stirrup member defining a tine engaging curve rea. asupporting surface; and b. a material handling apparatus having:

gisterable with said tine preparatory for the dumping operation. 3. Incombination: a. a supporting surface; and

b. a material handling apparatus having:

I. a dump type box having a bottom portion, opposed side portions and aback portion defining a load carrying cavity adapted to receive a bulkmaterial,

2. said dump type box also having:

a. a front fork engaging member on said one portion of a side portionand said bottom portion,

b. a rear fork engaging member on said one portion and spaced from saidfront fork engaging member, and

c. a fork engaging stirrup member on said one portion, disposed betweensaid front fork engaging member and said rear fork engaging member andpivotable on said one portion,

3. a lifting fork device reciprocable in a vertical plane with respectto said supporting surface and having a true,

4. said tine being insertable through said fork engaging l a dump typebox having a bottom portion, opposed side portions and a back portiondefining a load carrying cavity adapted to receive a bulk material,

' 2. said dump type box also having:

a. a front fork engaging member on one portion of a side portion andsaid bottom portion,

b. a rear fork engaging member on said one portion and spaced from saidfront fork engaging member, and

c. a fork engaging stirrup member on said one portion, disposed betweensaid front fork engaging member and said rear fork engaging member andpivotable on said one portion,

3. a lifting fork device reciprocable in a vertical plane 5 with respectto said supporting surface and having a tine,

4. said tine being insertable through said fork engaging stirrup memberwhile said dump type box is in a rest position and into registry withsaid front fork engaging member and said rear fork engaging member sothat said tine engages said front fork engaging member and said rearfork engaging member when said tine moves said dump type box away fromsaid rest position into a box transporting position,

stirrup member while said dump type box is in a rest position and intoregistry with said front fork engaging member and said rear forkengaging member so that said tine engages said front fork engagingmember and said rear fork engaging member when said tine moves said dumptype box away from said rest position into a box transporting position,

5. said tine then being operable to return said filled dump type box tosaid rest position to permit said tine to clear said front fork engagingmember, while said dump type box is in said rest position,

6. said tine then being operable to move said dump type box away fromsaid rest position so that said filled dump type box rotates about saidfork engaging stirrup member into a dumping position, and

7. having a first guard means on said one portion to prevententanglement of said tine between said front fork engaging member andsaid fork engaging stirrup member.

4. in combination:

a. a supporting surface; and

b. a material handling apparatus having:

1. a dump type box having a bottom portion, opposed side portions and aback portion defining a load carrying cavity adapted to receive a bulkmaterial,

2. said dump type box also having:

a. a front fork engaging member on one portion of a side portion andsaid bottom portion,

b. a rear fork engaging member on said one portion and spaced from saidfront fork engaging member, and

c. a fork engaging stirrup member on said one portion disposed betweensaid front fork engaging member and said rear fork engaging member andpivotable on said one portion,

3. a lifting fork device reciprocable in a vertical plane with respectto said supporting surface and having a tme,

4. said tine being insertable through said fork engaging stirrup memberwhile said dump type box is in a rest position and into registry withsaid front fork engaging member and said rear fork engaging member sothat said tine engages said front fork engaging member and said rearfork engaging member when said tine moves said dump type box away fromsaid rest position into a box transporting position,

. said tine then being operable to return said filled dum type box tosaid rest position to permit said tine to clear said front fork engagingmember, while said dump type box is in said rest position,

6. said tine then being operable to move said dump type box away fromsaid rest position so that said filed dump type box rotates about saidfork engaging stirrup member into a dumping position; and

7. having a second guard means on said one portion to prevententanglement of said tine between said fork engaging stirrup member andsaid rear fork engaging member.

5. in combination:

a. a supporting surface; and

b. a material handling apparatus having:

I. a dump type box having a bottom portion, opposed side portions and aback portion defining a load carrying cavity adapted to receive a bulkmaterial,

a. said bottom portion being adapted to rest in a normal rest positionon said supporting surface,

2. said dump type box also having:

a. opposed front fork engaging members on said opposed side portions,

b. opposed rear fork engaging members on said opposed side portions andspaced from said front fork engaging members, and

c. opposed fork engaging stirrup members on said opposed side portions,disposed between said opposed front fork engaging members and saidopposed rear fork engaging members and pivotable on said opposed sideportions,

3. a lifting fork device reciprocable in a vertical plane with respectto said supporting surface,

LII

4. said lifting fork device being insertable through said opposed forkengaging stirrup members while said dump type box is in said restposition and into registry with said opposed front fork engaging membersand said opposed rear fork engaging members so that said lifting forkdevice engages said opposed front fork engaging members and said opposedrear fork engaging members when said fork lifting device moves said dumptype box away from said rest position into a box transporting position,

. said lifting fork device then being operable to return said filleddump type box to said rest position to permit said lifting fork deviceto clear said opposed front fork engaging members, while said dump typebox is in said rest position,

6. said lifting fork device then being operable to move said dump typebox away from said rest position so that said filled dump type boxrotates about said opposed fork engaging stirrup members into a dumpingposition, and

7. each of said opposed front fork engaging members and said opposedrear fork engaging members defining a fork engaging curve registerablywith said fork lifting device preparatory for the lifting operation,

6. In combination:

a. a supporting surface; and

b. a material handling apparatus having:

1. a dump type box having a bottom portion, opposed side portions and aback portion defining a load carrying cavity adapted to receive a bulkmaterial,

a. said bottom portion being adapted to rest in a normal rest positionon said supporting surface,

2. said dump type box also having:

a. opposed front fork engaging members on said opposed side portions,

b. opposed rear fork engaging members on said opposed side portions andspaced from said front fork engaging members, and

c. opposed fork engaging stirrup members on said opposed side portions,disposed between said opposed front fork engaging members and saidopposed rear fork engaging members and pivotable on said opposed sideportions,

. a lifting fork device reciprocable in a vertical plane with respect tosaid supporting surface,

4. said lifting fork device being insertable through said opposed forkengaging stirrup members while said dump type box is in said restposition and into registry with said opposed front fork engaging membersand said opposed rear fork engaging members so that said lifting forkdevice engages said opposed front fork engaging members and said opposedrear fork engaging members when said fork lifting device moves said dumptype box away from said rest position into a box transporting position,

. said lifting fork device then being operable to return said filleddump type box to said rest position to permit said lifting fork deviceto clear said opposed front fork engaging members, while said dump typebox is in said rest position,

6. said lifting fork device then being operable to move said dump typebox away from said rest position so that said filled dump type boxrotates about said opposed fork engaging stirrup members into a dumpingposition, and

7. each of said opposed rear fork engaging members and said forkengaging stirrup members defining a fork engaging curve registerablewith said fork lifting device preparatory for the dumping operation.

7. in combination:

a. a supporting surface; and

b. a material handling apparatus having:

1. a dump type box having a bottom portion, opposed side portions and aback portion defining a load carrying cavity adapted to receive a bulkmaterial,

mun

2. said dump type box also having:

a. a front fork engaging member on either a side portion or said bottomportion,

b. a rear fork engaging member on the same portion as said front forkengaging member and spaced from said front fork engaging member, and

c. a fork engaging stirrup member on said same portion, disposed betweensaid front fork engaging member and said rear fork engaging member andpivotable on said same portion,

3. a lifting fork device reciprocable in a vertical plane with respectto said supporting surface and having a tine,

4. said tine being insertable through said fork engaging stirrup memberwhile said dump type box is in a rest position and into registry withsaid front fork engaging member and said rear fork engaging member sothat said tine engages said front fork engaging member and said rearfork engaging member when said tine moves said dump type box away fromsaid rest position into a box transporting position, said tine clearingthe inside top surface of said fork engaging stirrup member when saiddump type box is in said boxtransporting position said tine then beingoperable to return said filled dump type box to'said rest position topermit said tine to clear said front fork engaging member, while saiddump type box is in said rest position,

6. said tine then being operable to engage said inside top surface ofsaid fork engaging stirrup member and to move said dump type box awayfrom said rest position so that said filled dump type box rotates aboutsaid fork engaging stirrup member into a dumping position.

8. The combination recited in claim 7 wherein said tine is oscillatablebetween a first position substantially parallel to said supportingsurface and a second position disposed at an angle to said supportingsurface.

9. The combination recited in claim 7 wherein said dump type box rotatesinto said dumping position when the forward portion of said dump typebox engages said supporting surface.

10. The combination recited in claim 7 wherein said dump type box has afirst stop means on one of said opposed side portions for engaging suchtine to limit said dumping position of said dump type box.

11. The combination recited in claim 7 wherein said dump type box has asecond stop means on one of said back portion, side portion or bottomportion, for limiting the relative movement between said back portionand said fork lifting device.

12. The combination recited in claim 7 wherein fork engaging stirrupmember is disposed rearwardly of the center of gravity of said dump typebox.

13. The combination recited in claim 7 wherein said same portion is saidbottom portion.

14. The combination recited in claim 7 wherein said same portion is oneof said side portions.

15. The combination recited in claim 13 wherein said stirrup member issubstantially vertical and said tine is substantially vertical.

16. The combination recited in claim 13 wherein said stirrup member issubstantially horizontal and said tine is substantially horizontal.

17. The combination recited in claim 14 wherein said one portion issubstantially vertical and said tine is substantially vertical.

18. The combination recited in claim 14 wherein said one portion issubstantially horizontal and said tine is substantially horizontal.

19. in combination:

a. a supporting surface; and

b. a material handling apparatus having:

I. a dump type box having a bottom portion, opposed side portions and aback portion defining a load carrying cavity, adapted to receive a bulkmaterial,

a. said bottom portion being adapted to rest in a normal rest sition onsaid su rtin surface, 2. said dtiiiip type box also liiiiiing: g

a. opposed front fork engaging members on said opposed side portions,

b. opposed rear fork engaging members on said opposed side portions andspaced from said front fork engaging members, and

c. opposed fork engaging stirrup members on said opposed side portions,disposed between said opposed front fork engaging members and saidopposed rear fork engaging members and pivotable on said opposed sideportions,

3. a lifting fork device reciprocable in a vertical plane with respectto said supporting surface,

4. said tine being insertable through said fork engaging stirrupmember-while said dump type box is in a rest position and into registrywith said front fork engaging member and said rear fork engaging memberso that said tine engages said front fork engaging member and said rearfork engaging member when said tine moves said dump type box away fromsaid rest position into a box transporting position, said tine clearingthe inside top surface of said fork engaging stirrup member when saiddump type box is in said box transporting position,

5. said tine then being operable to return said filled dump type box tosaid rest position to permit said tine to clear said front fork engagingmember while said dump type box is in said rest position,

6. said tine then being operable to engage said inside top surface ofsaid fork engaging stirrup member and to move said dump type box awayfrom said rest position so that said filled dump type box rotates aboutsaid fork engaging stirrup member into a dumping position.

20. The combination recited in claim 19 wherein said lifting fork deviceis oscillatable between a first position substantially parallel to saidsupporting surface and a second position disposed at an angleto saidsupporting surface.

21. The combination recited in claim 19 wherein said dump type boxrotates into said dumping position when the forward portion of saidbottom portion of said dump type box engages said supporting surface.

22. The combination recited in claim 19 wherein said dump type box has afirst stop means on one of said opposed side portions for engaging suchfork lifting device to limit said dumping position of said dump typebox.

23. The combination recited in claim 19 wherein said dump type box has asecond stop means for limiting the relative movement between said backportion and said fork lifting device.

24. The combination recited in claim 19 wherein said opposed forkengaging stirrup members are disposed rearwardly of the center ofgravity of said dump type box.

25. The combination recited in claim 7 wherein said bottom portion has ataper of the front thereof to facilitate scoop loading of said dump typebox.

1. In combination: a. a supporting surface; and b. a material handlingapparatus having:
 1. a dump type box having a bottom portion, opposedside portions and a back portion defining a load carrying cavity adaptedto receive a bulk material,
 2. said dump type box also having: a. afront fork engaging member on one portion of a side portion and saidbottom portion, b. a rear fork engaging member on said one portion andspaced from said front fork engaging member, and c. a fork engagingstirrup member on said one portion, disposed between said front forkengaging member and said rear fork engaging member and pivotable on saidone portion,
 3. a lifting fork device reciprocable in a vertical planewith respect to said supporting surface and having a tine,
 4. said tinebeing insertable through said fork engaging stirrup member while saiddump type box is in a rest position and into registry with said frontfork engaging member and said rear fork engaging member so that saidtine engages said front fork engaging member and said rear fork engagingmember when said tine moves said dump type box away from said restposition into a box transporting position,
 5. said tine then beingoperable to return said filled dump type box to said rest position topermit said tine to clear said front fork engaging member, while saiddump type box is in said rest position,
 6. said tine then being operableto move said dump type box away from said rest position so that saidfilled dump type box rotates about said fork engaging stirrup memberinto a dumping position, and
 7. said front fork engaging member and saidrear fork engaging member defining a tine engaging curve registerablywith said tine preparatory for the lifting operation.
 2. said dump typebox also having: a. a front fork engaging member on one portion of aside portion and said bottom portion, b. a rear fork engaging member onsaid one portion and spaced from said front fork engaging member, and c.a fork engaging stirrup member on said one portion, disposed betweensaid front fork engaging member and said rear fork engaging member andpivotable on said one portion,
 2. In combination: a. a supportingsurface; and b. a material handling apparatus having:
 2. said dump typebox also having: a. a front fork engaging member on one portion of aside portion and said bottom portion, b. a rear fork engaging member onsaid one portion and spaced from said front fork engaging member, and c.a fork engaging stirrup member on said one portion, disposed betweensaid front fork engaging member and said rear fork engaging member andpivotable on said one portion,
 2. said dump type box also having: a. afront fork engaging member on said one portion of a side portion andsaid bottom portion, b. a rear fork engaging member on said one portionand spaced from said front fork engaging member, and c. a fork engagingstirrup member on said one portion, disposed between said front forkengaging member and said rear fork engaging member and pivotable on saidone portion,
 2. said dump type box also having: a. a front fork engagingmember on one portion of a side portion and said bottom portion, b. arear fork engaging member on said one portion and spaced from said frontfork engaging member, and c. a fork engaging stirrup member on said oneportion, disposed between said front fork engaging member and said rearfork engaging member and pivotable on said one portion,
 2. said dumptype box also having: a. a front fork engaging member on either a sideportion or said bottom portion, b. a rear fork engaging member on thesame portion as said front fork engaging member and spaced from saidfront fork engaging member, and c. a fork engaging stirrup member onsaid same portion, disposed between said front fork engaging member andsaid rear fork engaging member and pivotable on said same portion, 2.said dump type box also having: a. opposed front fork engaging memberson said opposed side portions, b. opposed rear fork engaging members onsaid opposed side portions and spaced from said front fork engagingmembers, and c. opposed fork engaging stirrup members on said opposedside portions, disposed between said opposed front fork engaging membersand said opposed rear fork engaging members and pivotable on saidopposed side portions,
 2. said dump type box also having: a. opposedfront fork engaging members on said opposed side portions, b. opposedrear fork engaging members on said opposed side portions and spaced fromsaid front fork engaging members, and c. opposed fork engaging stirrupmembers on said opposed side portions, disposed between said opposedfront fork engaging members and said opposed rear fork engaging membersand pivotable on said opposed side portions,
 2. said dump type box alsohaving: a. opposed front fork engaging members on said opposed sideportions, b. opposed rear fork engaging members on said opposed sideportions and spaced from said front fork engaging members, and c.opposed fork engaging stirrup members on said opposed side portions,disposed between said opposed front fork engaging members and saidopposed rear fork engaging members and pivotable on said opposed sideportions,
 3. a lifting fork device reciprocable in a vertical plane withrespect to said supporting surface,
 3. a lifting fork devicereciprocable in a vertical plane with respect to said supportingsurface,
 3. a lifting fork device reciprocable in a vertical plane withrespect to said supporting surface,
 3. In combination: a. a supportingsurface; and b. a material handling apparatus having:
 3. a lifting forkdevice reciprocable in a vertical plane with respect to said supportingsurface and having a tine,
 3. a lifting fork device reciprocable in avertical plane with respect to said supporting surface and having atine,
 3. a lifting fork device reciprocable in a vertical plane withrespect to said supporting surface and having a tine,
 3. a lifting forkdevice reciprocable in a vertical plane with respect to said supportingsurface and having a tine,
 3. a lifting fork device reciprocable in avertical plane with respect to said supporting surface and having atine,
 4. said tine being insertable through said fork engaging stirrupmember while said dump type box is in a rest position and into registrywith said front fork engaging member and said rear fork engaging memberso that said tine engages said front fork engaging member and said rearfork engaging member when said tine moves said dump type box away fromsaid rest position into a box transporting position,
 4. said tine beinginsertable through said fork engaging stirrup member while said dumptype box is in a rest position and into registry with said front forkengaging member and said rear fork engaging member so that said tineengages said front fork engaging member and said rear fork engagingmember when said tine moves said dump type box away from said restposition into a box transporting position,
 4. said tine being insertablethrough said fork engaging stirrup member while said dump type box is ina rest position and into registry with said front fork engaging memberand said rear fork engaging member so that said tine engages said frontfork engaging member and said rear fork engaging member when said tinemoves said dump type box away from said rest position into a boxtransporting position,
 4. said tine being insertable through said forkengaging stirrup member while said dump type box is in a rest positionand into registry with said front fork engaging member and said rearfork engaging member so that said tine engages said front fork engagingmember and said rear fork engaging member when said tine moves said dumptype box away from said rest position into a box transporting position,4. said tine being insertable through said fork engaging stirrup memberwhile said dump type box is in a rest position and into registry withsaid front fork engaging member and said rear fork engaging member sothat said tine engages said front fork engaging member and said rearfork engaging member when said tine moves said dump type box away fromsaid rest position into a box transporting position, said tine clearingthe inside top surface of said fork engaging stirrup member when saiddump type box is in said box transporting position ,
 4. In combination:a. a supporting surface; and b. a material handling apparatus having: 4.said lifting fork device being insertable through said opposed forkengaging stirrup members while said dump type box is in said restposition and into registry with said opposed front fork engaging membersand said opposed rear fork engaging members so that said lifting forkdevice engages said opposed front fork engaging members and said opposedrear fork engaging members when said fork lifting device moves said dumptype box away from said rest position into a box transporting position,4. said tine being insertable through said fork engaging stirrup memberwhile said dump type box is in a rest position and into registry withsaid front fork engaging member and said rear fork engaging member sothat said tine engages said front fork engaging member and said rearfork engaging member when said tine moves said dump type box away fromsaid rest position into a box transporting position, said tine clearingthe inside top surface of said fork engaging stirrup member when saiddump type box is in said box transporting position,
 4. said lifting forkdevice being insertable through said opposed fork engaging stirrupmembers while said dump type box is in said rest position and intoregistry with said opposed front fork engaging members and said opposedrear fork engaging members so that said lifting fork device engages saidopposed front fork engaging members and said opposed rear fork engagingmembers when said fork lifting device moves said dump type box away fromsaid rest position into a box transporting position,
 5. said liftingfork device then being operable to return said filled dump type box tosaid rest position to permit said lifting fork device to clear saidopposed front fork engaging members, while said dump type box is in saidrest position,
 5. said tine then being operable to return said filleddump type box to said rest position to permit said tine to clear saidfront fork engaging member while said dump type box is in said restposition,
 5. said lifting fork device then being operable to return saidfilled dump type box to said rest position to permit said lifting forkdevice to clear said opposed front fork engaging members, while saiddump type box is in said rest position,
 5. In combination: a. asupporting surface; and b. a material handling apparatus having:
 5. saidtine then being operable to return said filled dump type box to saidrest position to permit said tine to clear said front fork engagingmember, while said dump type box is in said rest position,
 5. said tinethen being operable to return said filled dump type box to said restposition to permit said tine to clear said front fork engaging member,while said dump type box is in said rest position,
 5. said tine thenbeing operable to return said filled dump type box to said rest positionto permit said tine to clear said front fork engaging member, while saiddump type box is in said rest position,
 5. said tine then being operableto return said filled dump type box to said rest position to permit saidtine to clear said front fork engaging member, while said dump type boxis in said rest position,
 5. said tine then being operable to returnsaid filled dump type box to said rest position to permit said tine toclear said front fork engaging member, while said dump type box is insaid rest position,
 6. said tine then being operable to move said dumptype box away from said rest position so that said filled dump type boxrotates about said fork engaging stirrup member into a dumping position,and
 6. said tine then being operable to move said dump type box awayfrom said rest position so that said filled dump type box rotates aboutsaid fork engaging stirrup member into a dumping position; and
 6. saidtine then being operable to move said dump type box away from said restposition so that said filled dump type box rotates about said forkengaging stirrup member into a dumping position, and
 6. said tine thenbeing operable to move said dump type box away from said rest positionso that said filled dump type box rotates about said fork engagingstirrup member into a dumping position; and
 6. said tine then beingoperable to engage said inside top surface of said fork engaging stirrupmember and to move said dump type box away from said rest position sothat said filled dump type box rotates about said fork engaging stirrupmember into a dumping position.
 6. In combination: a. a supportingsurface; and b. a material handling apparatus having:
 6. said liftingfork device then being operable to move said dump type box away fromsaid rest position so that said filled dump type box rotates about saidopposed fork engaging stirrup members into a dumping position, and 6.said tine then being operable to engage said inside top surface of saidfork engaging stirrup member and to move said dump type box away fromsaid rest position so that said filled dump type box rotates about saidfork engaging stirrup member into a dumping position.
 6. said liftingfork device then being operable to move said dump type box away fromsaid rest position so that said filled dump type box rotates about saidopposed fork engaging stirrup members into a dumping position, and 7.each of said opposed rear fork engaging members and said fork engagingstirrup members defining a fork engaging cuRve registerable with saidfork lifting device preparatory for the dumping operation.
 7. Incombination: a. a supporting surface; and b. a material handlingapparatus having:
 7. each of said opposed front fork engaging membersand said opposed rear fork engaging members defining a fork engagingcurve registerably with said fork lifting device preparatory for thelifting operation,
 7. having a second guard means on said one portion toprevent entanglement of said tine between said fork engaging stirrupmember and said rear fork engaging member.
 7. having a first guard meanson said one portion to prevent entanglement of said tine between saidfront fork engaging member and said fork engaging stirrup member. 7.saiD rear fork engaging member and said fork engaging stirrup memberdefining a tine engaging curve registerable with said tine preparatoryfor the dumping operation.
 7. said front fork engaging member and saidrear fork engaging member defining a tine engaging curve registerablywith said tine preparatory for the lifting operation.
 8. The combinationrecited in claim 7 wherein said tine is oscillatable between a firstposition substantially parallel to said supporting surface and a secondposition disposed at an angle to said supporting surface.
 9. Thecombination recited in claim 7 wherein said dump type box rotates intosaid dumping position when the forward portion of said dump type boxengages said supporting surface.
 10. The combination recited in claim 7wherein said dump type box has a first stop means on one of said opposedside portions for engaging such tine to limit said dumping position ofsaid dump type box.
 11. The combination recited in claim 7 wherein saiddump type box has a second stop means on one of said back portion, sideportion or bottom portion, for limiting the relative movement betweensaid back portion and said fork lifting device.
 12. The combinationrecited in claim 7 wherein fork engaging stirrup member is disposedrearwardly of the center of gravity of said dump type box.
 13. Thecombination recited in claim 7 wherein said same portion is said bottomportion.
 14. The combination recited in claim 7 wherein said sameportion is one of said side portions.
 15. The combination recited inclaim 13 wherein said stirrup member is substantially vertical and saidtine is substantially vertical.
 16. The combination recited in claim 13wherein said stirrup member is substantially horizontal and said tine issubstantially horizontal.
 17. The combination recited in claim 14wherein said one portion is substantially vertical and said tine issubstantially vertical.
 18. The combination recited in claim 14 whereinsaid one portion is substantially horizontal and said tine issubstantially horizontal.
 19. In combination: a. a supporting surface;and b. a material handling apparatus having:
 20. The combination recitedin claim 19 wherein said lifting fork device is oscillatable between afirst position substantially parallel to said supporting surface and asecond position disposed at an angle to said supporting surface.
 21. Thecombination recited in claim 19 wherein said dump type box rotates intosaid dumping position when the forward portion of said bottom portion ofsaid dump type box engages said supporting surface.
 22. The combinationrecited in claim 19 wherein said dump type box has a first stop means onone of said opposed side portions for engaging such fork lifting deviceto limit said dumping position of said dump type box.
 23. Thecombination recited in claim 19 wherein said dump type box has a secondstop means for limiting the relative movement between said back portionand said fork lifting device.
 24. The combination recited in claim 19wherein said opposed fork engaging stirrup members are disposedrearwardly of the center of gravity of said dump type box.
 25. Thecombination recited in claim 7 wherein said bottom portion has a taperof the front thereof to facilitate scoop loading of said dump type box.